Answer
Verified
430.2k+ views
Hint: You can find the number of valence electrons in an atom if you know its atomic number or electronic configuration. Atomic number of potassium is 19. By filling out the shells present in the atom in sequential order we can find out the valence electrons.
Complete Step by step answer:
Potassium is an element present in the very first group of the periodic table. It decides the valency which is the most important number as it provides ground for the most of the properties of the elements.
We know that the atomic number of Potassium is 19. Its electronic configuration will be 2,8,8,1. So this implies that the outermost shell is having one electron so this implies that valence of Potassium will be 1.
So the correct option is 2nd.
Additional Information: In periodic table,
The Group 1 atoms have 1 valence electron. The Group 2 atoms have 2 valence electrons. The Group 3 atoms have 3 valence electrons. The Group 4 atoms have 4 valence electrons. And so on we can find the no. of valence electrons. Valence electrons are the most important thing in chemistry as it decides the most of the chemical properties of the elements.
Note: Valence is the combining power of an element. Elements in the same group of the periodic table have the same valence. The valence of an element is related to how many electrons are in the outer shell.
Complete Step by step answer:
Potassium is an element present in the very first group of the periodic table. It decides the valency which is the most important number as it provides ground for the most of the properties of the elements.
We know that the atomic number of Potassium is 19. Its electronic configuration will be 2,8,8,1. So this implies that the outermost shell is having one electron so this implies that valence of Potassium will be 1.
So the correct option is 2nd.
Additional Information: In periodic table,
The Group 1 atoms have 1 valence electron. The Group 2 atoms have 2 valence electrons. The Group 3 atoms have 3 valence electrons. The Group 4 atoms have 4 valence electrons. And so on we can find the no. of valence electrons. Valence electrons are the most important thing in chemistry as it decides the most of the chemical properties of the elements.
Note: Valence is the combining power of an element. Elements in the same group of the periodic table have the same valence. The valence of an element is related to how many electrons are in the outer shell.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Which are the Top 10 Largest Countries of the World?
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Difference Between Plant Cell and Animal Cell
Give 10 examples for herbs , shrubs , climbers , creepers
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
How do you graph the function fx 4x class 9 maths CBSE
Write a letter to the principal requesting him to grant class 10 english CBSE